Punching-machine.



No. 810,796. PATENTED JAN. 23, 1906.

Y J. NELSON.

PUNG'HING MACHINE.

.APPLIOA-TION FILED 00w, 6, 1905.

2 SHEETS-SHEET l.

No; 810,796. PATENTED JAN. 23, 1906. J. NELSON.

PUNGHIN-G MACHINE.

APPLIOATION FILED 001. 5. 1905.

2 SHEETS-SHEET 2.

7d 3 73 .F/gfi 22 7f 75 79 2 John Nelson,

r I 1 I JOHN NELSON, OF OTTAWA, KANSAS.

PUNCHING-MACHINE.

Specification of Letters Patent.

Patented Jan. 23, 1906.

Application filed. October 5, 1905. Serial No. 281,501.

To all whom, it may concern.-

Be it known that I, JOHN NELsoN, a citizen of the United States, residing at Ottawa, in the county of Franklin and State of Kansas, have invented certain new and useful Improvements in Punching-Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in punching machines.

The object of the invention is to provide a machine by which apertures or slots may be punched in cylindrical or other shaped tubes or pipes, means being provided whereby the tubes and the punched-out metal will be automatically discharged from the die after each punching operation is completed.

With the above and other objects in View the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figurel is a front view of a punching-machine constructed in accordance withthe invention. Fig. 2 is a side view of the same. Fig. 3 is a vertical sectional view on the line 3 3 of Fig. 2. Fig. 4 is an enlarged detail sectional view of the die and its holding-block showing the operation of the discharging mechanism.

Fig. 5 is a similar view of the same, taken at right angles to Fig. 4, and showing the arrangement of the punches in the lower ends of the punch-arms.

Referring more particularly to the drawings, 1 denotes the frame of the machine, which is preferably secured upon a bench or table 2, and consists of upright suitablybraced side pieces in which are arranged bearings to receive the shafts of the operating mechanism arrangedthereon. On the top of the side pieces of the frame are journaled a pair of crank-shafts 3, on which adjacent to one of the sides of the frame are fixedly mounted a pair of spur gear-wheels 4, which are engaged with each other and are driven by means of a spur gear-pinion 5, which is mounted on a main drive-shaft 6, journaled in bearings on the top of the side pieces, as shown. On one end of the sh'aft6 longitudinally-disposed shafts 13, journaled in bearings in the lower portion of the frame 1, as shown. In the lower ends of the puncharms 12 are formed seats 14, in which are disposed punches 15, vsaid punches being held in the seats 14by means of set-screws 16. Each of the punches 15 is provided with suitablyshaped cutting-bits 17, which when the arms 12 are operated are forced through the sides of the tube that is being punched, thereby forming apertures therein corresponding to the shape of the bits on the punches.

On the table 2 is secured a die-holder 18,-

said holder being provided with a flanged. base 19, by means of which the same is bolted or otherwise firmly secured to the table. The die holder 18 consists of a rectangularlyshaped block, in the forward end of which is formed a socket or recess 20 to receive the inner end of the die 21, said die being held in the sockets by means of a set-screw 22. In the die 21 is formed a centrally-disposed aperture or bore 23, which when the die is in place in the holder is adapted to aline with a bore or aperture 24, formed in the die-block. In the die-holder is also formed four longitudinally-disposed apertures or passages 25,

through which are adapted to work rods or 29 is operated will be reciprocated back and forth through the alined apertures or bores 23 and 24 in the die and die-holder, thereby discharging the pieces of metal which have been punched out of the tube by the bits of IOC the punches, said punched-out pieces of the metal dropping into the bore 23 of the die and from thence they are pushed out by the cleaning-rod, as hereinbefore described.

The head 29 is loosely connected to the lower end of a discharge-lever 31 by means of links 32. The discharge-lever 31 is pivotally mounted in suitable brackets on one of the side pieces of the frame 1 adjacent to one of the spur gearwheels 4. On said spur gear-wheels 4 is formed a cam-lug 33, which when the wheel turns is adapted to be brought into engagement with the upper end of the discharge-lever, thereby rocking the same in the proper direction to operate the discharge mechanism secured to the lower end thereof, as hereinbefore described. A spring 34 (shown in dotted lines in Fig. 1) is secured to the side piece of the frame in position to engage the upper end of the discharge-lever and force the same in the opposite direction when released by the lug 33, therebyretracting said dis charging mechanism.

While I have herein shown and described the die as being cylindrical in shape to receive the ends of a cylindrical tube, it is obvious that said die may be formed in any suitable shape to receive any desired form of tube or pipe. The die is here shown as being provided with oppositely-disposed elongated apertures or slots 35 to correspond to the shape of the bits 17 on the punches l5, and while I have here shown said apertures and bits as being of elongated rectangular shape it is obvious that the same may be of any desired shape to cut apertures of any desired form in the tubes or pipes placed thereon.

The machine as herein shown and described is particularly adapted for punching apertures in the ends of wrought-iron bed-rails to receive a locking-key whereby the same is secured onto the laterally-projecting tenon of the bed-post, and in order to accommodate a wedge-shaped key the aperture 35 in one side of the rail and the bit 17 on the adjacent punch are of somewhat less length than the apertureand bit on the opposite side of said die, thus providing for the accommodation of the wedge-shaped key and enabling the same to be forcibly driven through the corresponding apertures formed in the bed-rail tube and tenon.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, what wheels, a die-holder, a

head,

I claim as new, Patent, is-

1. In a tube-punching machine of the character described, the combination with a supporting-frame, of a pair of punching-levers pivotally mounted therein, punches removably secured in the lower ends of said levers, crank-shafts revolubly mounted in said frame, links to connect the upper ends of said levers with thecranks on said shafts, means whereby said shafts are driven to operate said le vers, a die-holder, a die removably connected thereto, and means to automatically eject or discharge the punched tubes from said die, substantially as described.

2. In a machine for punching tubular metal, the combination with a supporting-frame, of a pair of punching-levers pivotally mounted therein, punches removably secured in the lower end of said levers, crank-shafts journaled in said frame, links to connect the upper ends of said levers with the cranks on said shafts, intermeshing gear wheels fixedly mounted on said crank-shafts, a main driveshaft, a pinion to engage one of said gearwheels,a die-holder,a die removably connected to said holder, and an automatically-operated discharge mechanism adapted to remove the punched tubes and the punched-out metal from said die, substantially as described.

3. In a machine for punching tubular metal, the combination with a supporting-frame, of a pair of punching-levers pivotally mounted therein, punches removably secured in the lower end of said levers, crank-shafts journaled in said frame, links to connect the upper ends of said levers with the cranks on said shafts, intermeshing gear wheels fixedly mounted on said crank-shafts, a main driveshaft, a pinion to engage one of said gearhollow die removably connected to said holder, a discharge-lever pivotally mounted in said frame, an ejectorplate slidably mounted on said die, a dischargehead connected to said plate and to the lower end of said lever, and means to' automatically operate said lever after each operation of the punching mechanism, substantially as described.

4. In amachine for punching tubular metal, the combination with a supporting-frame, of a pair of punching-levers pivotally mounted therein, punches removably secured in the lower end of said levers, crank-shafts journaled in said frame, links to connect the upper ends of said levers with the cranks on said shafts, intermeshing gear wheels fixedly mounted on said crank-shafts, a main driveshaft, a pinion to engage one of said gearwheels, a die-holder, a discharge-lever pivotally mounted in said frame, a tube-ejector plate slidably mounted on said die, a dischargeguide-rods connecting said head and and desire to secure by Letters plate, a centrally-disposed cleaning-rod con In testimony whereof I have hereunto set nected to and operated by said head to remove my hand in presence of two subscribing wit- I0 the pufilched metacl1 from said ll1oll0wldie,la nesses.

pivota y mounte discharge ever oose y connected at its lower end to said head, and a JOHN NELSON cam-lug arranged on one of said gear-Wheels Witnesses:

to engage and operate said lever, substantially A. E. SKINNER,

as described. I G. (L SMITH. 

